Basic Pattern of Inheritance

Multiple Choice

Brown eyes (B) are dominant over blue eyes (b). Mr. Mallin has blue eyes. What is his genotype?

• BB

• Bb

• bb

Multiple Choice

The trait or allele that is expressed when only one is present is called the ___________ trait.

• dominant

• recessive

Multiple Choice

A condition in which a person's skin, hair, and eyes lack normal coloring is called

• pigment disease
• albinism
• pink eye syndrome
• cystic fibrosis

Multiple Select

Which factors possibly affect the changes in skin color around the world?

• Changes in UV intensity

• Reproductive selection (Choosing a mate)

• Temperature

• Genetic Mutation

Multiple Choice

Disease that caused the body to produce thick and sticky mucus that can clog the lungs and obstruct the pancreas.

• hemophilia

• cystic fibrosis

• tay sachs

• sickle cell anemia

Multiple Choice

Cystic fibrosis is caused by

• a small change in the DNA sequence of one gene
• nondisjunction during meiosis
• crossing-over between sex-chromosomes
• the combined effects of many genes

Multiple Choice

A rare, inherited disorder that destroys nerve cells in the brain and spinal cord. Four years life expectancy.

• tay-sachs

• klinefelter syndrome

• huntington's disease

• down syndrome

Multiple Choice

who is affected by Tay Sachs?

• human fetus/infants
• plants &animals
• only plants
• only animals

Multiple Choice

Which disorder is treated by restricting milk in the diet?

• phenylketonuria

• cystic fibrosis

• galactosemia

• Tay-Sachs disease

Multiple Select

Mark the effects of Tay-Sachs disease:

• Vision problems

• Excessive mucus production

• Kidney failure

• Buildup of fatty deposits in the brain

• Mental disabilities

Multiple Choice

Galactosemia is caused by what?

• The gene that codes for a membrane protein is defective.

• Genes do not produce normal amounts of the pigment melanin.

• Absence of the gene that codes for the enzyme that breaks down galactose.

• Absence of a necessary enzyme that breaks down fatty substances.

Multiple Choice

Which of the following is a dominant disorder?

• ALD

• huntington's disease

• sickle cell

• Turner Syndrome

Multiple Choice

when are you most likely diagnosed with achondroplasia?

• when your a teenager

• at birth

• as an infant

• as an adult

Multiple Choice

What sex does achondroplasia affect most?

• male

• female

• affects both equally

• blue haired

Multiple Choice

what is a symptom of achondroplasia?

• no head

• headches

• short limbs

• big ears

Multiple Choice

The following pedigree chart shows _______ females and ______ males that DO NOT have the trait.

• 7, 3

• 4, 4

• 3, 2

• 3, 3

• 57, 93.5

Multiple Choice

How many generations are shown in this pedigree?

• 1
• 2
• 3
• 4

Multiple Choice

What do half colored symbols represent?

• The individual is a carrier (heterozygous).
• The individual expresses the trait.
• The individual has both recessive alleles.
• The individual has both dominant alleles.

Multiple Choice

How many females are in this pedigree?

• 3
• 4
• 6
• 7